Street Fighter tops video circuit BOB DILLIER DAILY JOURNAL BUSINESS EDITOR About four times a week, Vu Duong fights a Brazilian mutant from the rain forest, then takes on a tough Chinese female kung fu expert, followed by an American Marine. The 19-year-old Greenwood man isn't training for the Barcelona Olympics. He's merely joined the millions of video game players hooked on Street Fighter II, one of the hottest arcade games around. Duong, a junior chemistry major at the University of Indianapolis, cruises into Aladdin's Castle in Greenwood Park Mall and plops tokens into the machine. In recent months, Street Fighter II has racked up the biggest sales since Pac Man appeared on the color screens more than a decade ago.